Abstract The vast range of applications for enzymes in the production biofuels has led to a major increase market demand recent years. Cellulase's high cost and poor catalytic efficiency are two key barriers industrial usage lignocellulosic biomass as feedstocks fuels biorefineries. In this study, economic evaluation cellulase solid-state fermentation was done by designing process routes (batch...

in this paper, an economic decisions-making model based on mathematics in order to optimize the costs of investment in accordance with innovative technology of human resources recruitment introduced and in the next section, the economic impact of the internet recruitment technologies has been examined.  in order to fulfill these demands classic economic order quantity model of have developed as...

The classical economic order quantity model is extended to the case where items may be acquired from various suppliers. It assumed that any lot size received a supplier contains perfect and imperfect quality items. percentage of in random variable having known probability distribution. are detected through 100% screening process conducted at start inventory cycle. When concluded, sold one batch...

To access the efficient inventory system, managers should consider all the situations that have happened in reality. One of these situations is the presence of the defective items in each received lot and the other situation is being the group of customers that do not wait to fulfill their requirements from the vendor and choose another one to get their orders so the proportion of the backorder...

The goal of supply chain management is to provide products with best quality, low costs and shortest delay of delivery corresponding to customers’ expectations. To ensure that, companies must be in continuous research for management methodologies which allows them the possibility to improve their financial results by decreasing costs and improving their process and thus customers satisfaction. ...